CN110933533A - Optical path backup method and device - Google Patents
Optical path backup method and device Download PDFInfo
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Abstract
The invention discloses a method and a device for optical path backup, wherein the method comprises the following steps: setting a main optical path and a standby optical path, and connecting the main optical path or the standby optical path to a wavelength division multiplexing module through a change-over switch of an optical path switching module to perform system backup; initializing an abnormal threshold and a light path switching mode parameter, and determining a light path switching mode according to the light path switching mode parameter; the monitoring module collects and monitors the optical power value of an in-use optical path, namely a main optical path or a standby optical path which is connected with the wavelength division multiplexing module through a selector switch; the monitoring module compares the optical power value of the in-use optical path with the abnormal threshold, determines the optical power value state according to the comparison result, and selects the main optical path or the standby optical path as the link channel for system data transmission according to the optical power value state. By adopting the method, the backup and seamless switching of the optical path are realized while the optical fiber resources are saved, the reliability of the 5G network transmission access network is greatly improved, the optical fiber resources are saved, and the construction cost is reduced.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method and an apparatus for optical path backup.
Background
The development of 5G technology and mobile communication network thereof is promoted due to the interconnection of everything, and with the maturity of 5G technology and standard, 5G network strategy deployment is developed by the country, and 5G is already comprehensively developed and constructed. The 5G network adopts Multiple key technologies such as ultra-dense networking, large-scale Multiple-Input Multiple-Output (MIMO) systems, cloud networks and the like, compared with the 4G network, the technical characteristics and the equipment form of the 5G network are greatly changed, the 5G ultra-dense networking brings a large amount of site construction, and the requirements on site address, transmission and interference control are high; the MIMO technology evolves the architecture of the 5G base station, and integrates a Remote Radio Unit (RRU) and an Antenna into an Active Antenna processing Unit (AAU), which has heavy weight, large volume, large power consumption, and large data transmission amount. The technology and equipment characteristics of the 5G network make the construction of the 5G network face different requirements from the construction of the traditional 2G/3G/4G network systems and the like, and particularly face the key and difficult points of construction of multiple operators, multiple network systems and complex network systems, and the related matching construction of the 5G network.
The C-RAN (Central and Clean-Radio Access Network) is a green and energy-saving wireless Access Network framework, is mainly placed in a Centralized manner based on BBU, has the characteristics of centralization, collaboration, Cloud computing and the like, can effectively solve the problems and challenges of difficult station building, high station building cost and the like in 5G Network construction, and is an important mode for building a 5G era mobile Network in order to save Network construction cost and accelerate construction progress, more and more 5G networks are deployed based on the C-RAN, and the C-RAN construction is an important mode for building the 5G era mobile Network. Compared with a traditional Distributed-Radio access network (D-RAN) wireless network networking mode, the C-RAN network architecture has distinct characteristics, (1) a baseband processing Unit (BBU) is centralized: BBUs are placed in a centralized mode, interference is reduced through an inter-station cooperation technology, capacity is improved, and spectrum efficiency is improved; (2) BBU collaboration: by introducing a real-time high-speed internal interconnection architecture, scheduling information, channel information and user data can be exchanged between different BBUs in a BBU baseband pool quickly and efficiently, and cross-BBU cooperation can be better realized.
The 5G MIMO technology has high requirement on the forward bandwidth and large requirement on optical fiber resources; in the current stage, 5G construction is to save the site resources of a machine room, reduce cost and improve efficiency, and C-RAN construction is the first choice; the 5G technology has the technical characteristics of low time delay and high reliability, the 5G network puts higher requirements on the time delay of a forward network, and the ultra-low time delay enables small-scale deployment to become the first choice of 5G C-RAN; network Function Virtualization (NFV) of 5G Technology, multi-Radio Access Technology (RAT) resource coordination, and the like, and 5G C-RAN deployment requirements are based on a Virtualization and cloud architecture. The technical characteristics of the 5G network make the 5G network construction face transmission resource limitation, need a large amount of optical fiber resources, and for urban areas, a large amount of pipelines and optical cables are constructed, so that the difficulty is high.
The 5G transmission Interface may adopt an enhanced Common Radio Interface (eCPRI) or a Common Public Radio Interface (CPRI), and the eCPRI has a characteristic of reducing a forward bandwidth compared with the CPRI, and has a low requirement on a bandwidth of an optical module, thereby reducing the cost of the optical module. In order to save optical fiber resources and solve the transmission bottleneck of 5G network construction, besides introducing advanced protocol technologies such as eccri, various forwarding solutions can be adopted, such as: schemes such as a passive Wavelength Division Multiplexing (WDM) based on a single-core bidirectional Optical fiber direct drive and a color light module, and an active WDM based on a WDM + Optical Transport Network (OTN) device.
Specifically, various schemes have different characteristics, wherein in the optical fiber direct drive scheme based on single-core bidirectional, a single-core bidirectional optical module is replaced at the side of the RRU and the BBU, and the data transmission requirement can be met by fewer optical fibers between the RRU and the BBU; the passive WDM based on color light module or the active WDM scheme based on WDM + OTN equipment adopts WDM technology, different transmission circuits adopt different wavelengths for forming color light to be combined into one optical fiber for transmission, the scheme absorbs the advantages of wavelength division technology and optical fiber direct drive mode, AAU and BBU both adopt color light modules, the optical fibers are respectively connected into a local wavelength division multiplexer, the wavelength division multiplexer and the color light modules are responsible for completing multipath wave combination and wave division, 1 optical fiber is adopted between the wavelength division multiplexers to connect single fibers for bidirectional connection, the optical fiber resources are greatly saved, and the deployment cost is low. By adopting the WDM technology, a large number of BBUs are concentrated, the number of the managed RRUs is large, the coverage area is wide, the requirement on the transmission reliability is high, particularly the requirement on the transmission reliability of a backbone of an access network and a backhaul network is high, and the corresponding transmission backup requirement is required.
For a passive WDM (wavelength division multiplexing) scheme based on a color light module or an active WDM scheme based on WDM + OTN (optical transport network + optical transport network) equipment, because the scheme does not have an automatic optical path backup function, the reliability of an optical path is difficult to ensure, and the scheme is limited in the application of access network backbone transmission requiring the optical path backup function; in order to make the scheme have the optical path backup capability, a backup system which is the same as the original optical path is added in a common way, so that one more set of optical path equipment is needed, the cost of a transmission system is greatly increased, and meanwhile, in order to realize the automatic seamless optical path switching function, a set of optical path backup control system is needed, and the complexity and the cost of the system are increased.
Disclosure of Invention
The invention provides a method and a device for optical path backup, which are used for solving the problems of limited optical fiber resources and limited optical path reliability caused by large demand on optical fibers in the existing 5G network transmission scheme, particularly the transmission access network scheme.
A method for backup of a lightpath, comprising the steps of:
step 1, setting a main optical path and a standby optical path, and connecting the main optical path or the standby optical path to a wavelength division multiplexing module through a change-over switch of an optical path switching module to perform system backup;
step 2, initializing an abnormal threshold and a light path switching mode parameter, and determining a light path switching mode according to the light path switching mode parameter, wherein the abnormal threshold comprises a light power value abnormal threshold and a light power abnormal accumulated duration threshold, and the light path switching mode comprises an automatic mode and a manual mode;
step 3, the monitoring module collects and monitors the optical power value of the in-use optical path, namely the main optical path or the standby optical path which is connected with the wavelength division multiplexing module through the selector switch;
and 4, comparing the optical power value of the in-use optical path with an abnormal threshold value by the monitoring module, determining the optical power value state according to the comparison result, and selecting the main optical path or the standby optical path as a link channel for system data transmission according to the optical power value state.
Further, in an implementation manner, the optical path switching manner in step 2 includes an automatic mode, and when the optical path switching manner is the automatic mode, step 4 includes:
step 4-1, the optical path switching module defaults to select a main optical path as a link channel for system data transmission on an optical path;
step 4-2, the monitoring module compares the optical power value of the optical path in use with an abnormal threshold value to obtain a comparison result: when the comparison result shows that the optical power value of the optical path in use is greater than or equal to the optical power abnormal threshold, the optical power value state of the optical path in use is a normal state; when the comparison result shows that the optical power value of the optical path in use is smaller than the optical power abnormal threshold, the optical power value state of the optical path in use is an abnormal state;
step 4-3, if the optical power value of the optical path in use is in a normal state, clearing a timer for accumulating the abnormal duration of the optical power value of the optical path in use, and executing the step 2; if the optical power value state of the in-use optical path is an abnormal state, executing step 4-4;
step 4-4, starting a timer for accumulating the abnormal duration of the optical power value of the optical path in use, and obtaining the abnormal accumulated duration of the optical power value of the optical path in use;
step 4-5, if the abnormal accumulated duration of the optical power value of the in-use optical path is smaller than the threshold of the abnormal accumulated duration of the optical power, executing the step 2;
step 4-6, if the abnormal accumulated time of the optical power value of the in-use optical path is greater than or equal to the optical power abnormal accumulated time threshold, judging that the in-use optical path has a fault, and judging whether the in-use optical path is a main optical path or a standby optical path;
if the optical path in use is the main optical path, the monitoring module controls a switch of the optical path switching module to start optical path switching, switches the standby optical path as a link channel for system data transmission, reports a main optical path fault alarm and an optical path switching alarm to a network management center, and executes the step 2;
and if the optical path in use is a standby optical path, reporting a standby optical path fault alarm to the network management center, and executing the step 2.
Further, in an implementation manner, when the optical path switching manner is a manual mode, the step 4 includes: the monitoring module receives a switching instruction issued by a dial switch on a network management center, a maintenance terminal or a light path backup device, and switches the standby light path or the main light path as a link channel for system data transmission according to the switching instruction.
Further, in an implementation manner, when the primary optical path or the backup optical path fails and fails to repair, the switching manner of the primary optical path and the backup optical path is reset to an automatic mode, and a failure repair alarm is reported to a network management center.
Further, in an implementation manner, an optical path backup device includes a wavelength division multiplexing module, an optical power acquisition module, an optical path switching module, a monitoring module, and a power supply module;
the wavelength division multiplexing module is divided into a wave combiner and a wave splitter and is used for synthesizing or separating light waves with different wavelengths, the wavelength division multiplexing module supports light wave convergence ratios with different light wave quantities, and the light wave convergence ratio is the maximum quantity of the wavelength division multiplexing module supporting the multiplexing wavelengths;
the optical power acquisition module is used for acquiring the optical power of each wavelength division wavelength and each wavelength combination wavelength, converting the acquired optical power into an electric signal and transmitting the electric signal to the monitoring module for operation and processing;
the optical path switching module is used for switching the main optical path and the standby optical path in real time according to a switching instruction;
the monitoring module is used for carrying out electric signal acquisition, operation, storage and processing on the optical power of each wavelength division wavelength and wavelength combination wavelength, and determining whether the main optical path and the standby optical path have faults or not by judging the monitored optical power value state; when any one optical path has a fault, issuing a switching instruction to the optical path switching module to switch the optical path for carrying out system backup, and reporting an optical path fault alarm and an optical path switching alarm to a network management center;
the power supply module is used for providing a power supply meeting the requirements of voltage, current and ripple of components of each module for each module of the optical path backup device;
the network management center is used for performing remote parameter query, parameter setting and equipment management operation on the optical path backup device, and comprises the steps of setting system parameters of the optical path backup device, and performing remote query on the alarm state and the optical path switching state of the main optical path and the standby optical path.
As can be seen from the foregoing technical solutions, embodiments of the present invention provide a method and an apparatus for optical path backup. The method comprises the following steps: setting a main optical path and a standby optical path, and connecting the main optical path or the standby optical path to a wavelength division multiplexing module through a change-over switch of an optical path switching module to perform system backup; initializing an abnormal threshold and a light path switching mode parameter, and determining a light path switching mode according to the light path switching mode parameter; the monitoring module collects and monitors the optical power value of an in-use optical path, namely a main optical path or a standby optical path which is connected with the wavelength division multiplexing module through a selector switch; the monitoring module compares the optical power value of the in-use optical path with the abnormal threshold, determines the optical power value state according to the comparison result, and selects the main optical path or the standby optical path as the link channel for system data transmission according to the optical power value state.
The existing 5G network transmission scheme, particularly the transmission access network scheme, has the problems of large requirement on optical fibers, limited optical fiber resources and limited optical path reliability. By adopting the method or the device, the backup and seamless switching of the optical path are realized while the purpose of saving the optical fiber resources is achieved, and compared with the prior art, the reliability of the 5G network transmission access network can be greatly improved, the optical fiber resources are saved, and the construction cost is reduced.
Specifically, compared with the prior art, the invention has the following advantages and effects:
(1) the optical path backup method and the device support that single-core bidirectional data transmission is realized by adopting a single-core optical fiber among the transmission devices, thereby greatly saving optical fiber resources, sharing optical path resources of all stations, and having low cost and simple construction;
(2) the invention adopts the optical path backup method of the main optical path or the standby optical path, supports the automatic or manual switching mode, has high stability and reliability, and solves the problem of high requirement on the reliability of the optical path, such as the concentration of BBU (base band unit);
(3) the invention adopts the intelligent optical path backup method of the main optical path or the standby optical path, supports the power monitoring of each wavelength division wavelength and wavelength combination wavelength, has high real-time and intelligent degree for the remote communication topology management of the device, and is beneficial to maintenance and management;
(4) the single-core optical path adopted by the invention replaces the traditional multi-core optical path solution, thus solving the engineering construction problems of limited field optical fiber resources, limited optical path arrangement and the like;
(5) the invention is particularly suitable for the scenes that the optical fiber resource demand is large, the optical fiber resource is limited, the station optical fiber resource is difficult to arrange, and the like, which need BBU centralized arrangement, such as: hub building core machine room, airport, subway, large office, commercial district and other BBU centralized stations; the optical wave convergence ratio of the optical path backup device can be considered according to the centralized quantity of the BBUs, one set of optical path backup device can simultaneously support access of more BBUs, particularly a shared scene of co-construction of multiple operator machine rooms is realized, the fusion and sharing of optical fiber resources are realized, and the resource utilization is maximized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic workflow diagram of a backup method of an optical path according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a fault recovery operation in an optical path backup method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an optical path backup apparatus provided in part by the embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The current 5G network construction has high requirements on transmission, particularly forward access, and is a trend based on a C-RAN construction mode, the transmission, particularly the forward access network construction faces many challenges, the rapid and low-cost construction of the 5G network is restricted, in order to save optical fiber resources and ensure the reliability of an optical path, an optical path backup method and an optical path backup device are researched to achieve the purpose of saving the optical fiber resources and achieve the backup and seamless switching of the optical path, so that the reliability of the 5G network transmission access network can be greatly improved, the optical fiber resources are saved, and the construction cost is reduced. The method and the device have the advantages of simple realization, convenient use, low cost and high stability, and effectively solve the problems of limited optical fiber resources, limited optical path reliability and the like.
In specific application, the method is particularly suitable for scenes that need BBU centralized deployment, such as large optical fiber resource demand, limited optical fiber resources, difficult station optical fiber resource deployment and the like, for example: hub building core machine room, airport, subway, large office, commercial district and other BBU centralized stations; the optical wave convergence ratio of the optical path backup device can be considered according to the centralized quantity of the BBUs, one set of optical path backup device can simultaneously support access of more BBUs, particularly a shared scene of co-construction of multiple operator machine rooms is realized, the fusion and sharing of optical fiber resources are realized, and the resource utilization is maximized.
The invention aims to overcome the defects of the existing 5G network transmission scheme, particularly the transmission access network scheme, and provides a light path backup method and a device, wherein the method is operated on the light path backup device. Referring to fig. 1, which is a schematic diagram of a work flow of an optical path backup method provided in an embodiment of the present invention, the optical path backup method according to the embodiment of the present invention includes the following steps:
step 1, setting a main optical path and a standby optical path, and connecting the main optical path or the standby optical path to a wavelength division multiplexing module through a change-over switch of an optical path switching module to perform system backup; in this step, at the same time, the switch connects the wavelength division multiplexing module to only one optical path, that is, the switch connects the wavelength division multiplexing module to only one of the main optical path and the standby optical path. In this embodiment, the default wavelength division multiplexing module is connected to the main optical path.
Step 2, initializing an abnormal threshold and a light path switching mode parameter, and determining a light path switching mode according to the light path switching mode parameter, wherein the abnormal threshold comprises a light power value abnormal threshold and a light power abnormal accumulated duration threshold, and the light path switching mode comprises an automatic mode and a manual mode; in this step, the optical power abnormal accumulated time threshold is an accumulated time threshold that generates an optical power value abnormality. The abnormal threshold value and the optical path switching mode parameter are remotely set by a network management center or locally preset by a field operation maintenance terminal and are stored in a nonvolatile register of the device.
During initialization, the monitoring module reads corresponding parameter values from the local nonvolatile register and assigns values to the corresponding parameters, so that a light path switching mode is determined. In this embodiment, the range of the optical power value abnormal threshold is set to-12 dBm to-5 dBm, the default value is-10 dBm, the abnormal accumulated time threshold is set to 15 milliseconds, and the switching mode between the main optical path and the standby optical path is an automatic mode.
Step 3, the monitoring module collects and monitors the optical power value of the in-use optical path, namely the main optical path or the standby optical path which is connected with the wavelength division multiplexing module through the selector switch;
and 4, comparing the optical power value of the in-use optical path with an abnormal threshold value by the monitoring module, determining the optical power value state according to the comparison result, and selecting the main optical path or the standby optical path as a link channel for system data transmission according to the optical power value state.
In the optical path backup method described in this embodiment, when the optical path switching mode is the automatic mode, step 4 includes:
step 4-1, the optical path switching module defaults to select a main optical path as a link channel for system data transmission on an optical path;
step 4-2, the monitoring module compares the optical power value of the optical path in use with an abnormal threshold value to obtain a comparison result: when the comparison result shows that the optical power value of the optical path in use is greater than or equal to the optical power abnormal threshold, the optical power value state of the optical path in use is a normal state; when the comparison result shows that the optical power value of the optical path in use is smaller than the optical power abnormal threshold, the optical power value state of the optical path in use is an abnormal state;
step 4-3, if the optical power value of the optical path in use is in a normal state, clearing a timer for accumulating the abnormal duration of the optical power value of the optical path in use, and executing the step 2; if the optical power value state of the in-use optical path is an abnormal state, executing step 4-4;
step 4-4, starting a timer for accumulating the abnormal duration of the optical power value of the optical path in use, and obtaining the abnormal accumulated duration of the optical power value of the optical path in use;
step 4-5, if the abnormal accumulated duration of the optical power value of the in-use optical path is smaller than the threshold of the abnormal accumulated duration of the optical power, executing the step 2; in this embodiment, the threshold may be appropriately set according to the data communication link guarantee requirement and the avoidance of false alarm.
Step 4-6, if the abnormal accumulated time of the optical power value of the in-use optical path is greater than or equal to the optical power abnormal accumulated time threshold, judging that the in-use optical path has a fault, and judging whether the in-use optical path is a main optical path or a standby optical path;
if the optical path in use is the main optical path, the monitoring module controls a switch of the optical path switching module to start optical path switching, switches the standby optical path as a link channel for system data transmission, reports a main optical path fault alarm and an optical path switching alarm to a network management center, and executes the step 2;
specifically, in this step, the monitoring module determines whether backup switching is required by monitoring the optical power value state.
And if the optical path in use is a standby optical path, reporting a standby optical path fault alarm to the network management center, and executing the step 2. Specifically, in this embodiment, when the optical path is the backup optical path, the step 2 is returned after the alarm and report, and at this time, the backup optical path still alarms when the optical path is still the backup optical path or the fault determination is performed on the backup optical path, but the report is not repeated, that is, the function of switching the backup is stopped, and the manual repair is waited.
In the optical path backup method described in this embodiment, when the optical path switching mode is the manual mode, step 4 includes: the monitoring module receives a switching instruction issued by a dial switch on a network management center, a maintenance terminal or a light path backup device, and switches the standby light path or the main light path as a link channel for system data transmission according to the switching instruction.
In the optical path backup method described in this embodiment, when the primary optical path or the backup optical path fails and is repaired, the switching mode between the primary optical path and the backup optical path is reset to the automatic mode, and a failure repair alarm is reported to the network management center. In this embodiment, specifically, when the main optical path or the backup optical path has a fault, a field maintenance person goes to the field to repair the fault, and a corresponding optical path fault repair instruction is triggered by the field operation maintenance terminal, the switching mode between the main optical path and the backup optical path is reset to the automatic mode, and a fault repair alarm is reported to the network management center.
As shown in fig. 2, which is a schematic diagram of a workflow of fault recovery in an optical path backup method according to an embodiment of the present invention, includes the following steps:
firstly, when an optical path fault alarm occurs, namely a main optical path or a standby optical path has a fault, and an optical path switching alarm and a fault is repaired, a field maintenance worker triggers a fault repairing instruction of an optical path backup device through a field operation maintenance terminal, the optical path backup device triggers a fault repairing mode, the optical path switching mode is reset to an automatic mode, a fault repairing alarm is reported, and the optical path is switched to a default main optical path;
then, the optical path backup device starts the subsequent steps in the automatic mode.
As shown in fig. 3, on the basis of the optical path backup method described in this embodiment, an embodiment of the present invention further provides an optical path backup device, which includes a wavelength division multiplexing module, an optical power acquisition module, an optical path switching module, a monitoring module, and a power module;
the wavelength division multiplexing module is divided into a wave combiner and a wave splitter and is used for synthesizing or separating light waves with different wavelengths, the wavelength division multiplexing module supports light wave convergence ratios with different light wave quantities, and the light wave convergence ratio is the maximum quantity of the wavelength division multiplexing module supporting the multiplexing wavelengths. In this embodiment, the wave combiner and the wave splitter are respectively disposed at two ends of the optical fiber, a series of optical signals with different wavelengths carrying information are combined into a bundle of optical signals at the transmitting end through the wave combiner, the optical signals are transmitted in a single optical fiber, and a bundle of optical signals is separated into optical signals with different wavelengths at the receiving end through the wave splitter, so as to achieve the purpose of simultaneously transmitting multiple signals on one optical fiber.
The optical power acquisition module is used for acquiring the optical power of each wavelength division wavelength and each wavelength combination wavelength, converting the acquired optical power into an electric signal and transmitting the electric signal to the monitoring module for operation and processing; specifically, the wavelength division multiplexing module is a passive wavelength division multiplexing module or an active wavelength division multiplexing module; the optical power collected by the optical power collecting module comprises optical receiving power and optical power.
The optical path switching module is used for switching the main optical path and the standby optical path in real time according to a switching instruction; the optical path switching module comprises an optical path switching controller and an optical switch. Specifically, in this embodiment, the optical path switching module mainly includes an optical switch and an optical switch controller, and is configured to complete the action of switching the main optical path and the standby optical path in real time. The optical path switching module controls the optical switch to realize the switching of the main optical path and the standby optical path according to a switching instruction sent by the monitoring module; the input end of the optical switch is connected with the wavelength division multiplexing module, and the output end of the optical switch is respectively connected with the main optical path and the standby optical path; the light path switching module is charged by the power supply module to provide stable power supply.
The monitoring module is used for carrying out electric signal acquisition, operation, storage and processing on the optical power of each wavelength division wavelength and wavelength combination wavelength, and determining whether the main optical path and the standby optical path have faults or not by judging the monitored optical power value state; when any one optical path has a fault, issuing a switching instruction to the optical path switching module to switch the optical path for carrying out system backup, and reporting an optical path fault alarm and an optical path switching alarm to a network management center; in this embodiment, the monitoring module may be configured with an ethernet module or a wireless modem to report the optical path failure alarm and the optical path switching alarm to the network management center remotely.
The power supply module is used for providing a power supply meeting the requirements of voltage, current and ripple of components of each module for each module of the optical path backup device; specifically, in this embodiment, the module that needs to be powered in the apparatus includes an optical power acquisition module, an optical path switching module, and a monitoring module.
The network management center is used for performing remote parameter query, parameter setting and equipment management operation on the optical path backup device, and comprises the steps of setting system parameters of the optical path backup device, and performing remote query on the alarm state and the optical path switching state of the main optical path and the standby optical path.
Specifically, in this embodiment, the field operation maintenance terminal is configured to perform local parameter query and parameter setting operation on the device in the field of the device, and issue a switching instruction of the main optical path and the standby optical path to the device, and is connected to the monitoring module of the device in the field through the ethernet or the USB or RS232/RS485 serial port, so that the field operation maintenance terminal can perform local manual switching of the main optical path and the standby optical path on the field control of the monitoring module, besides completing the same functions of parameter query and parameter setting as the network management center.
As can be seen from the foregoing technical solutions, embodiments of the present invention provide a method and an apparatus for optical path backup. The method comprises the following steps: setting a main optical path and a standby optical path, and connecting the main optical path or the standby optical path to a wavelength division multiplexing module through a change-over switch of an optical path switching module to perform system backup; initializing an abnormal threshold and a light path switching mode parameter, and determining a light path switching mode according to the light path switching mode parameter; the monitoring module collects and monitors the optical power value of an in-use optical path, namely a main optical path or a standby optical path which is connected with the wavelength division multiplexing module through a selector switch; the monitoring module compares the optical power value of the in-use optical path with the abnormal threshold, determines the optical power value state according to the comparison result, and selects the main optical path or the standby optical path as the link channel for system data transmission according to the optical power value state.
The existing 5G network transmission scheme, particularly the transmission access network scheme, has the problems of large requirement on optical fibers, limited optical fiber resources and limited optical path reliability. By adopting the method or the device, the backup and seamless switching of the optical path are realized while the purpose of saving the optical fiber resources is achieved, and compared with the prior art, the reliability of the 5G network transmission access network can be greatly improved, the optical fiber resources are saved, and the construction cost is reduced.
Specifically, compared with the prior art, the invention has the following advantages and effects:
(1) the optical path backup method and the device support that single-core bidirectional data transmission is realized by adopting a single-core optical fiber among the transmission devices, thereby greatly saving optical fiber resources, sharing optical path resources of all stations, and having low cost and simple construction;
(2) the invention adopts the optical path backup method of the main optical path or the standby optical path, supports the automatic or manual switching mode, has high stability and reliability, and solves the problem of high requirement on the reliability of the optical path, such as the concentration of BBU (base band unit);
(3) the invention adopts the intelligent optical path backup method of the main optical path or the standby optical path, supports the power monitoring of each wavelength division wavelength and wavelength combination wavelength, has high real-time and intelligent degree for the remote communication topology management of the device, and is beneficial to maintenance and management;
(4) the single-core optical path adopted by the invention replaces the traditional multi-core optical path solution, thus solving the engineering construction problems of limited field optical fiber resources, limited optical path arrangement and the like;
(5) the invention is particularly suitable for the scenes that the optical fiber resource demand is large, the optical fiber resource is limited, the station optical fiber resource is difficult to arrange, and the like, which need BBU centralized arrangement, such as: hub building core machine room, airport, subway, large office, commercial district and other BBU centralized stations; the optical wave convergence ratio of the optical path backup device can be considered according to the centralized quantity of the BBUs, one set of optical path backup device can simultaneously support access of more BBUs, particularly a shared scene of co-construction of multiple operator machine rooms is realized, the fusion and sharing of optical fiber resources are realized, and the resource utilization is maximized.
In specific implementation, the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in each embodiment of the optical path backup method and apparatus provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the description in the method embodiment.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.
Claims (5)
1. A backup method for a lightpath, comprising the steps of:
step 1, setting a main optical path and a standby optical path, and connecting the main optical path or the standby optical path to a wavelength division multiplexing module through a change-over switch of an optical path switching module to perform system backup;
step 2, initializing an abnormal threshold and a light path switching mode parameter, and determining a light path switching mode according to the light path switching mode parameter, wherein the abnormal threshold comprises a light power value abnormal threshold and a light power abnormal accumulated duration threshold, and the light path switching mode comprises an automatic mode and a manual mode;
step 3, the monitoring module collects and monitors the optical power value of the in-use optical path, namely the main optical path or the standby optical path which is connected with the wavelength division multiplexing module through the selector switch;
and 4, comparing the optical power value of the in-use optical path with an abnormal threshold value by the monitoring module, determining the optical power value state according to the comparison result, and selecting the main optical path or the standby optical path as a link channel for system data transmission according to the optical power value state.
2. A backup method of optical path according to claim 1, wherein when the optical path switching mode is automatic mode, the step 4 comprises:
step 4-1, the optical path switching module defaults to select a main optical path as a link channel for system data transmission on an optical path;
step 4-2, the monitoring module compares the optical power value of the optical path in use with an abnormal threshold value to obtain a comparison result: when the comparison result shows that the optical power value of the optical path in use is greater than or equal to the optical power abnormal threshold, the optical power value state of the optical path in use is a normal state; when the comparison result shows that the optical power value of the optical path in use is smaller than the optical power abnormal threshold, the optical power value state of the optical path in use is an abnormal state;
step 4-3, if the optical power value of the optical path in use is in a normal state, clearing a timer for accumulating the abnormal duration of the optical power value of the optical path in use, and executing the step 2; if the optical power value state of the in-use optical path is an abnormal state, executing step 4-4;
step 4-4, starting a timer for accumulating the abnormal duration of the optical power value of the optical path in use, and obtaining the abnormal accumulated duration of the optical power value of the optical path in use;
step 4-5, if the abnormal accumulated duration of the optical power value of the in-use optical path is smaller than the threshold of the abnormal accumulated duration of the optical power, executing the step 2;
step 4-6, if the abnormal accumulated time of the optical power value of the in-use optical path is greater than or equal to the optical power abnormal accumulated time threshold, judging that the in-use optical path has a fault, and judging whether the in-use optical path is a main optical path or a standby optical path;
if the optical path in use is the main optical path, the monitoring module controls a switch of the optical path switching module to start optical path switching, switches the standby optical path as a link channel for system data transmission, reports a main optical path fault alarm and an optical path switching alarm to a network management center, and executes the step 2;
and if the optical path in use is a standby optical path, reporting a standby optical path fault alarm to the network management center, and executing the step 2.
3. A backup method of optical paths according to claim 1, wherein when the optical path switching mode is manual mode, the step 4 comprises: the monitoring module receives a switching instruction issued by a dial switch on a network management center, a maintenance terminal or a light path backup device, and switches the standby light path or the main light path as a link channel for system data transmission according to the switching instruction.
4. The optical path backup method according to claim 3, wherein when the primary optical path or the backup optical path fails and is repaired, the switching mode between the primary optical path and the backup optical path is reset to an automatic mode, and a failure repair alarm is reported to the network management center.
5. An optical path backup device is characterized by comprising a wavelength division multiplexing module, an optical power acquisition module, an optical path switching module, a monitoring module and a power supply module;
the wavelength division multiplexing module is divided into a wave combiner and a wave splitter and is used for synthesizing or separating light waves with different wavelengths, the wavelength division multiplexing module supports light wave convergence ratios with different light wave quantities, and the light wave convergence ratio is the maximum quantity of the wavelength division multiplexing module supporting the multiplexing wavelengths;
the optical power acquisition module is used for acquiring the optical power of each wavelength division wavelength and each wavelength combination wavelength, converting the acquired optical power into an electric signal and transmitting the electric signal to the monitoring module for operation and processing;
the optical path switching module is used for switching the main optical path and the standby optical path in real time according to a switching instruction;
the monitoring module is used for carrying out electric signal acquisition, operation, storage and processing on the optical power of each wavelength division wavelength and wavelength combination wavelength, and determining whether the main optical path and the standby optical path have faults or not by judging the monitored optical power value state; when any one optical path has a fault, issuing a switching instruction to the optical path switching module to switch the optical path for carrying out system backup, and reporting an optical path fault alarm and an optical path switching alarm to a network management center;
the power supply module is used for providing a power supply meeting the requirements of voltage, current and ripple of components of each module for each module of the optical path backup device;
the network management center is used for performing remote parameter query, parameter setting and equipment management operation on the optical path backup device, and comprises the steps of setting system parameters of the optical path backup device, and performing remote query on the alarm state and the optical path switching state of the main optical path and the standby optical path.
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